421421537690496 has 1536 divisors, whose sum is σ = 1555934679936000. Its totient is φ = 113098945462272.

The previous prime is 421421537690477. The next prime is 421421537690497. The reversal of 421421537690496 is 694096735124124.

421421537690496 is a `hidden beast` number, since 4 + 2 + 1 + 4 + 2 + 1 + 53 + 7 + 6 + 90 + 496 = 666.

It is a super-2 number, since 2×421421537690496² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421421537690497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 104649001635 + ... + 104649005661.

It is an arithmetic number, because the mean of its divisors is an integer number (1012978307250).

Almost surely, 2^{421421537690496} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 421421537690496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (777967339968000).

421421537690496 is an abundant number, since it is smaller than the sum of its proper divisors (1134513142245504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421421537690496 is an equidigital number, since it uses as much as digits as its factorization.

421421537690496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4671 (or 4633 counting only the distinct ones).

The product of its (nonzero) digits is 78382080, while the sum is 63.

The spelling of 421421537690496 in words is "four hundred twenty-one trillion, four hundred twenty-one billion, five hundred thirty-seven million, six hundred ninety thousand, four hundred ninety-six".